Federal standards for rear vehicle illumination allows red, yellow, or amber. Turn signal may be any of the 3 colors, brake and taillights must be red. The only location a white or clear light can be used is for license plate illumination and the effective light cannot exceed 5 feet from the rear of the vehicle. Vehicle side illumination must be red on the back half of the vehicle, yellow or amber on the forward. Front turn signals must be amber or yellow. Red lights are specifically banned from the front half of motor vehicles below the hoodline and green, blue, and purple light are not allowed on passenger cars and light trucks.